ab = {

      'Swaroop' : '2868397063@qq.com',
      'Larry'   :  'www.larry.org',
       'Coin'   :   'lianbicoin',
      'Nike'    :  'just do it'
}

print  "Swaroop's address is %s"% ab['Swaroop']
ab['Gudio'] = 'wuaoyi@gmail.com'
del ab['Larry']
print ab

for name,address in ab.items():
    print 'contact %s at %s ' % (name,address)
if 'Gudio' in ab:
    print ab['Gudio']
